Merge branch 'master' of git://git.infradead.org/users/linville/wireless-next into for-davem

1 files changed, 458 insertions, 0 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/pmu.c b/drivers/net/wireless/brcm80211/brcmsmac/pmu.c
new file mode 100644
index 00000000000..3b36e3acfd7
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmsmac/pmu.c
@@ -0,0 +1,458 @@
+/*
+ * Copyright (c) 2011 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include <brcm_hw_ids.h>
+#include <chipcommon.h>
+#include <brcmu_utils.h>
+#include "pub.h"
+#include "aiutils.h"
+#include "pmu.h"
+
+/*
+ * external LPO crystal frequency
+ */
+#define EXT_ILP_HZ 32768
+
+/*
+ * Duration for ILP clock frequency measurment in milliseconds
+ *
+ * remark: 1000 must be an integer multiple of this duration
+ */
+#define ILP_CALC_DUR	10
+
+/* Fields in pmucontrol */
+#define	PCTL_ILP_DIV_MASK	0xffff0000
+#define	PCTL_ILP_DIV_SHIFT	16
+#define PCTL_PLL_PLLCTL_UPD	0x00000400	/* rev 2 */
+#define PCTL_NOILP_ON_WAIT	0x00000200	/* rev 1 */
+#define	PCTL_HT_REQ_EN		0x00000100
+#define	PCTL_ALP_REQ_EN		0x00000080
+#define	PCTL_XTALFREQ_MASK	0x0000007c
+#define	PCTL_XTALFREQ_SHIFT	2
+#define	PCTL_ILP_DIV_EN		0x00000002
+#define	PCTL_LPO_SEL		0x00000001
+
+/* ILP clock */
+#define	ILP_CLOCK		32000
+
+/* ALP clock on pre-PMU chips */
+#define	ALP_CLOCK		20000000
+
+/* pmustatus */
+#define PST_EXTLPOAVAIL	0x0100
+#define PST_WDRESET	0x0080
+#define	PST_INTPEND	0x0040
+#define	PST_SBCLKST	0x0030
+#define	PST_SBCLKST_ILP	0x0010
+#define	PST_SBCLKST_ALP	0x0020
+#define	PST_SBCLKST_HT	0x0030
+#define	PST_ALPAVAIL	0x0008
+#define	PST_HTAVAIL	0x0004
+#define	PST_RESINIT	0x0003
+
+/* PMU resource bit position */
+#define PMURES_BIT(bit)	(1 << (bit))
+
+/* PMU corerev and chip specific PLL controls.
+ * PMU<rev>_PLL<num>_XX where <rev> is PMU corerev and <num> is an arbitrary
+ * number to differentiate different PLLs controlled by the same PMU rev.
+ */
+/* pllcontrol registers:
+ * ndiv_pwrdn, pwrdn_ch<x>, refcomp_pwrdn, dly_ch<x>,
+ * p1div, p2div, _bypass_sdmod
+ */
+#define PMU1_PLL0_PLLCTL0		0
+#define PMU1_PLL0_PLLCTL1		1
+#define PMU1_PLL0_PLLCTL2		2
+#define PMU1_PLL0_PLLCTL3		3
+#define PMU1_PLL0_PLLCTL4		4
+#define PMU1_PLL0_PLLCTL5		5
+
+/* pmu XtalFreqRatio */
+#define	PMU_XTALFREQ_REG_ILPCTR_MASK	0x00001FFF
+#define	PMU_XTALFREQ_REG_MEASURE_MASK	0x80000000
+#define	PMU_XTALFREQ_REG_MEASURE_SHIFT	31
+
+/* 4313 resources */
+#define	RES4313_BB_PU_RSRC		0
+#define	RES4313_ILP_REQ_RSRC		1
+#define	RES4313_XTAL_PU_RSRC		2
+#define	RES4313_ALP_AVAIL_RSRC		3
+#define	RES4313_RADIO_PU_RSRC		4
+#define	RES4313_BG_PU_RSRC		5
+#define	RES4313_VREG1P4_PU_RSRC		6
+#define	RES4313_AFE_PWRSW_RSRC		7
+#define	RES4313_RX_PWRSW_RSRC		8
+#define	RES4313_TX_PWRSW_RSRC		9
+#define	RES4313_BB_PWRSW_RSRC		10
+#define	RES4313_SYNTH_PWRSW_RSRC	11
+#define	RES4313_MISC_PWRSW_RSRC		12
+#define	RES4313_BB_PLL_PWRSW_RSRC	13
+#define	RES4313_HT_AVAIL_RSRC		14
+#define	RES4313_MACPHY_CLK_AVAIL_RSRC	15
+
+/* Determine min/max rsrc masks. Value 0 leaves hardware at default. */
+static void si_pmu_res_masks(struct si_pub *sih, u32 * pmin, u32 * pmax)
+{
+	u32 min_mask = 0, max_mask = 0;
+	uint rsrcs;
+
+	/* # resources */
+	rsrcs = (sih->pmucaps & PCAP_RC_MASK) >> PCAP_RC_SHIFT;
+
+	/* determine min/max rsrc masks */
+	switch (sih->chip) {
+	case BCM43224_CHIP_ID:
+	case BCM43225_CHIP_ID:
+		/* ??? */
+		break;
+
+	case BCM4313_CHIP_ID:
+		min_mask = PMURES_BIT(RES4313_BB_PU_RSRC) |
+		    PMURES_BIT(RES4313_XTAL_PU_RSRC) |
+		    PMURES_BIT(RES4313_ALP_AVAIL_RSRC) |
+		    PMURES_BIT(RES4313_BB_PLL_PWRSW_RSRC);
+		max_mask = 0xffff;
+		break;
+	default:
+		break;
+	}
+
+	*pmin = min_mask;
+	*pmax = max_mask;
+}
+
+static void
+si_pmu_spuravoid_pllupdate(struct si_pub *sih, struct chipcregs __iomem *cc,
+			   u8 spuravoid)
+{
+	u32 tmp = 0;
+
+	switch (sih->chip) {
+	case BCM43224_CHIP_ID:
+	case BCM43225_CHIP_ID:
+		if (spuravoid == 1) {
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL0);
+			W_REG(&cc->pllcontrol_data, 0x11500010);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL1);
+			W_REG(&cc->pllcontrol_data, 0x000C0C06);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL2);
+			W_REG(&cc->pllcontrol_data, 0x0F600a08);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL3);
+			W_REG(&cc->pllcontrol_data, 0x00000000);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL4);
+			W_REG(&cc->pllcontrol_data, 0x2001E920);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL5);
+			W_REG(&cc->pllcontrol_data, 0x88888815);
+		} else {
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL0);
+			W_REG(&cc->pllcontrol_data, 0x11100010);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL1);
+			W_REG(&cc->pllcontrol_data, 0x000c0c06);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL2);
+			W_REG(&cc->pllcontrol_data, 0x03000a08);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL3);
+			W_REG(&cc->pllcontrol_data, 0x00000000);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL4);
+			W_REG(&cc->pllcontrol_data, 0x200005c0);
+			W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL5);
+			W_REG(&cc->pllcontrol_data, 0x88888815);
+		}
+		tmp = 1 << 10;
+		break;
+
+		W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL0);
+		W_REG(&cc->pllcontrol_data, 0x11100008);
+		W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL1);
+		W_REG(&cc->pllcontrol_data, 0x0c000c06);
+		W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL2);
+		W_REG(&cc->pllcontrol_data, 0x03000a08);
+		W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL3);
+		W_REG(&cc->pllcontrol_data, 0x00000000);
+		W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL4);
+		W_REG(&cc->pllcontrol_data, 0x200005c0);
+		W_REG(&cc->pllcontrol_addr, PMU1_PLL0_PLLCTL5);
+		W_REG(&cc->pllcontrol_data, 0x88888855);
+
+		tmp = 1 << 10;
+		break;
+
+	default:
+		/* bail out */
+		return;
+	}
+
+	tmp |= R_REG(&cc->pmucontrol);
+	W_REG(&cc->pmucontrol, tmp);
+}
+
+u16 si_pmu_fast_pwrup_delay(struct si_pub *sih)
+{
+	uint delay = PMU_MAX_TRANSITION_DLY;
+
+	switch (sih->chip) {
+	case BCM43224_CHIP_ID:
+	case BCM43225_CHIP_ID:
+	case BCM4313_CHIP_ID:
+		delay = 3700;
+		break;
+	default:
+		break;
+	}
+
+	return (u16) delay;
+}
+
+void si_pmu_sprom_enable(struct si_pub *sih, bool enable)
+{
+	struct chipcregs __iomem *cc;
+	uint origidx;
+
+	/* Remember original core before switch to chipc */
+	origidx = ai_coreidx(sih);
+	cc = ai_setcoreidx(sih, SI_CC_IDX);
+
+	/* Return to original core */
+	ai_setcoreidx(sih, origidx);
+}
+
+/* Read/write a chipcontrol reg */
+u32 si_pmu_chipcontrol(struct si_pub *sih, uint reg, u32 mask, u32 val)
+{
+	ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, chipcontrol_addr),
+		   ~0, reg);
+	return ai_corereg(sih, SI_CC_IDX,
+			  offsetof(struct chipcregs, chipcontrol_data), mask,
+			  val);
+}
+
+/* Read/write a regcontrol reg */
+u32 si_pmu_regcontrol(struct si_pub *sih, uint reg, u32 mask, u32 val)
+{
+	ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, regcontrol_addr),
+		   ~0, reg);
+	return ai_corereg(sih, SI_CC_IDX,
+			  offsetof(struct chipcregs, regcontrol_data), mask,
+			  val);
+}
+
+/* Read/write a pllcontrol reg */
+u32 si_pmu_pllcontrol(struct si_pub *sih, uint reg, u32 mask, u32 val)
+{
+	ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, pllcontrol_addr),
+		   ~0, reg);
+	return ai_corereg(sih, SI_CC_IDX,
+			  offsetof(struct chipcregs, pllcontrol_data), mask,
+			  val);
+}
+
+/* PMU PLL update */
+void si_pmu_pllupd(struct si_pub *sih)
+{
+	ai_corereg(sih, SI_CC_IDX, offsetof(struct chipcregs, pmucontrol),
+		   PCTL_PLL_PLLCTL_UPD, PCTL_PLL_PLLCTL_UPD);
+}
+
+/* query alp/xtal clock frequency */
+u32 si_pmu_alp_clock(struct si_pub *sih)
+{
+	u32 clock = ALP_CLOCK;
+
+	/* bail out with default */
+	if (!(sih->cccaps & CC_CAP_PMU))
+		return clock;
+
+	switch (sih->chip) {
+	case BCM43224_CHIP_ID:
+	case BCM43225_CHIP_ID:
+	case BCM4313_CHIP_ID:
+		/* always 20Mhz */
+		clock = 20000 * 1000;
+		break;
+	default:
+		break;
+	}
+
+	return clock;
+}
+
+void si_pmu_spuravoid(struct si_pub *sih, u8 spuravoid)
+{
+	struct chipcregs __iomem *cc;
+	uint origidx, intr_val;
+
+	/* Remember original core before switch to chipc */
+	cc = (struct chipcregs __iomem *)
+			ai_switch_core(sih, CC_CORE_ID, &origidx, &intr_val);
+
+	/* update the pll changes */
+	si_pmu_spuravoid_pllupdate(sih, cc, spuravoid);
+
+	/* Return to original core */
+	ai_restore_core(sih, origidx, intr_val);
+}
+
+/* initialize PMU */
+void si_pmu_init(struct si_pub *sih)
+{
+	struct chipcregs __iomem *cc;
+	uint origidx;
+
+	/* Remember original core before switch to chipc */
+	origidx = ai_coreidx(sih);
+	cc = ai_setcoreidx(sih, SI_CC_IDX);
+
+	if (sih->pmurev == 1)
+		AND_REG(&cc->pmucontrol, ~PCTL_NOILP_ON_WAIT);
+	else if (sih->pmurev >= 2)
+		OR_REG(&cc->pmucontrol, PCTL_NOILP_ON_WAIT);
+
+	/* Return to original core */
+	ai_setcoreidx(sih, origidx);
+}
+
+/* initialize PMU chip controls and other chip level stuff */
+void si_pmu_chip_init(struct si_pub *sih)
+{
+	uint origidx;
+
+	/* Gate off SPROM clock and chip select signals */
+	si_pmu_sprom_enable(sih, false);
+
+	/* Remember original core */
+	origidx = ai_coreidx(sih);
+
+	/* Return to original core */
+	ai_setcoreidx(sih, origidx);
+}
+
+/* initialize PMU switch/regulators */
+void si_pmu_swreg_init(struct si_pub *sih)
+{
+}
+
+/* initialize PLL */
+void si_pmu_pll_init(struct si_pub *sih, uint xtalfreq)
+{
+	struct chipcregs __iomem *cc;
+	uint origidx;
+
+	/* Remember original core before switch to chipc */
+	origidx = ai_coreidx(sih);
+	cc = ai_setcoreidx(sih, SI_CC_IDX);
+
+	switch (sih->chip) {
+	case BCM4313_CHIP_ID:
+	case BCM43224_CHIP_ID:
+	case BCM43225_CHIP_ID:
+		/* ??? */
+		break;
+	default:
+		break;
+	}
+
+	/* Return to original core */
+	ai_setcoreidx(sih, origidx);
+}
+
+/* initialize PMU resources */
+void si_pmu_res_init(struct si_pub *sih)
+{
+	struct chipcregs __iomem *cc;
+	uint origidx;
+	u32 min_mask = 0, max_mask = 0;
+
+	/* Remember original core before switch to chipc */
+	origidx = ai_coreidx(sih);
+	cc = ai_setcoreidx(sih, SI_CC_IDX);
+
+	/* Determine min/max rsrc masks */
+	si_pmu_res_masks(sih, &min_mask, &max_mask);
+
+	/* It is required to program max_mask first and then min_mask */
+
+	/* Program max resource mask */
+
+	if (max_mask)
+		W_REG(&cc->max_res_mask, max_mask);
+
+	/* Program min resource mask */
+
+	if (min_mask)
+		W_REG(&cc->min_res_mask, min_mask);
+
+	/* Add some delay; allow resources to come up and settle. */
+	mdelay(2);
+
+	/* Return to original core */
+	ai_setcoreidx(sih, origidx);
+}
+
+u32 si_pmu_measure_alpclk(struct si_pub *sih)
+{
+	struct chipcregs __iomem *cc;
+	uint origidx;
+	u32 alp_khz;
+
+	if (sih->pmurev < 10)
+		return 0;
+
+	/* Remember original core before switch to chipc */
+	origidx = ai_coreidx(sih);
+	cc = ai_setcoreidx(sih, SI_CC_IDX);
+
+	if (R_REG(&cc->pmustatus) & PST_EXTLPOAVAIL) {
+		u32 ilp_ctr, alp_hz;
+
+		/*
+		 * Enable the reg to measure the freq,
+		 * in case it was disabled before
+		 */
+		W_REG(&cc->pmu_xtalfreq,
+		      1U << PMU_XTALFREQ_REG_MEASURE_SHIFT);
+
+		/* Delay for well over 4 ILP clocks */
+		udelay(1000);
+
+		/* Read the latched number of ALP ticks per 4 ILP ticks */
+		ilp_ctr =
+		    R_REG(&cc->pmu_xtalfreq) & PMU_XTALFREQ_REG_ILPCTR_MASK;
+
+		/*
+		 * Turn off the PMU_XTALFREQ_REG_MEASURE_SHIFT
+		 * bit to save power
+		 */
+		W_REG(&cc->pmu_xtalfreq, 0);
+
+		/* Calculate ALP frequency */
+		alp_hz = (ilp_ctr * EXT_ILP_HZ) / 4;
+
+		/*
+		 * Round to nearest 100KHz, and at
+		 * the same time convert to KHz
+		 */
+		alp_khz = (alp_hz + 50000) / 100000 * 100;
+	} else
+		alp_khz = 0;
+
+	/* Return to original core */
+	ai_setcoreidx(sih, origidx);
+
+	return alp_khz;
+}